Pressure gun for fishing tools



C. OCHS PRESSURE GUN FOR FISHING TOOLS W C13/rame 06h51 3 2 u 3 wf w H 2 22 9 IIV- J l. 7. n m lll Il r ln l. .i Il 1H.\l 1v x m L 6 6 6 5 3 Nov. 11, 1924- Patented Nov.. 11, 1924.

1,515,066 PATENT OFFICE.

GLARENCE OCHS, 0F LONG- IBEACH, CALIFORNIA..

PRESSURE GUN FOR FISHING TOOLS.

Application led January 71924. Serial No. 684,915.

To all lwhom it\mag concern:

Be it known that I, CLARENCE 0011s, a citizen of the United States, residing at Long Beach, in the county of Los Angeles and ,State of California, have invented new' and useful Improvements in Pressure Guns for.

Fishing Tools, of which the following is a i specification.

My present invention being referred to as a pressure gun'for fishing tools, it may be understood to be an object of this invention to provide novel and effective methods and means for the establishment of circulation through a lish caught in the ly to the loosening and withdrawal of thesame, to "permit further drilling or other' desired operations, it is an object of this invention to provide -:means whereby the weight of a string ofdrill pipe, or the like,

may be utilized in what I Amay term a hydraulic gun or pressure gun, which may be secured`at the lower endof such a string of pipe, the lower end of said gun being preferably connected, or adapted for connection with, a threading tool, such as a tap or die, which may be of a usual or any preferred design capable of cutting an interior or exterior thread upon the upper end of a fish,-the said threading toolwbe'- ing adapted to remain in engagement with the fish so caught and to serve in the ultimate elevation and withdrawal thereof.

It is an object of this invention to pro- V-ide a pressure gun comprising a pistonand a cylinder capable of relative reciprocation but incapable of relative rotation,

one of the mentioned elements being provided with means for connection directly or indirectly with a string of pipe and the other being provided with means for vdirect or indirect connection with a fish; and in a preferred embodiment of my invention, the said piston and cylinder elements may bc respectively provided with valves opening only in an inward ordownward directtion, adapting the same to force a circulating iuid,such as an ordinary slush, downwardly or vlaterally into the said gunv and out through. the lower end of a fish.-

Other objects of my invention including certain details in the construction of plstons and plungers and in the construction of valved subs and connecting elements will appear from the following description of advantageous 'embodiments thereof, taken in connection with the appended claims and the accompanying drawings in which Fig. l is a vertical, longitudinal section through a pressure gun embodying my invention.;

Fig. 2 is an elevational view, with arts broken away or sectioned, this view eing taken on a somewhat smaller scale in order to show the relationship of the novel parts of my pressure gun with a -pipe line and a hreading tool and fish to be removed there- Fig. 3 is a horizontal section substantially on the line of Fig. 2.

Fig. 4 is a similar section showing an al- -ternative construct-ion hereinafter referred toc Referring to details of that speciic'embodiment of my invention chosen for purposes of illustration, it being a primar object of this invention to provided a evice which can be carried upon the lower end of a string of drill pipe, or the like, when fishing, for the purpose of creating an enormous downward fluid pressure, so as toA carried upon the same, areA shown a series v of rubber or other suitable packing sleeves 4, 4', the outer surfaces of which packing sleeves, or their equivalent, should conform to inner walls of the cylinder 1.

The mentioned sleeves are shown as adjustable by compression such as that of lock nut 5, at the lower end of said plunger, and spacers or expansion rings 6, 6aL and 6", when employed, may slide relatively to the cen- 105 tral -body'7 of said plunger, although the last or uppermost spacer 8 may engage a stop such as the shoulder or collar 8 thereon.

The upward and downward stroke of a plunger of the character referred to may be ico limited by means such. as a heavy bushing or head 9, shown as having a threaded engagementwith the upper end of the cylinder 1, the inner horizontal face ofv said head being adapted to transmit upwardly any strain'reoeived from, for example, the

shoulder or collar 8 upon the plunger 2.

The main shank 10 of the piston or plunger 2 is shown as provided with circulation channel l1 running longitudinally therethrough, and this 'shank is preferably noncircular in cross-sectional outline, the outer surface of the shank shown being rounded, although provided with a longitudinal V- shaped channel or channels 12 (or with a substantially rectangular channel 12, in the embodiment illustrated in Fig. 4) interfitting ywith a corresponding feather or key or projection 14 (or 14', Fig. 4) upon the bushing or head 9 (the feather or key 14', of the embodiment vshown in Fig. 4, being shown as retained by a machine screw 14a.)

By an arrangement such as has been referred to, it will be obvious that means are provided permitting a relative reciprocation of the plunger 2 within the barrel or cylinder 1 although precluding a relative rotation of the mentioned parts. It will be obvious that either the cylinder 1 or the plunger 2, may, within the scope of my invention, be connected with an operating string of pipe capable` of either a rotary or reciprocatory movement; and that, in any event, a suitable fit between the inside surface of the cylinder 1 and the plunger 2 or the packing thereon, as well as a suitable valve arrangement, is necessary to the production of a powerful downward pressure upon vfluid which may be confined beneath said plunger, in a manner suitable to the dislodgement of a fish with which the lower end of my pressure gun may be directly or indirectly connected.

To compel water or slu'sh or any liquid mixture below orv within the plunger 2 to move downward under pressure applied thereby, I may provide anysuitable means and 4for the purpose here referred to, I have shown, as screwed upon the top end of the plunger shank 10, a special tool joint box or sub 15, inside of which maybe carried an ordinary ball and socket valve comprising an apertured andv threaded plug 16 carrying a cage 17, shown as retaining not only a seat 18 and a ball 19 but alsoa coil spring 20 confined y therein.

The cylinder 1 may be 'threaded at its Vlower end within a special toolfjoint or fitting 21, Shown as terminating in'a pin 22 and as also providedwith a ball ,and socket A valveY permitting only a downward movement of fluid therethrough, the general construction'and relationshlp's of the ball and socket valve here referred to being optionally substantially the same as that described above, the corresponding parts of the present valve being designated by corresponding numerals 16 to20 inclusive.

The pin 20 may beconnected with any suitable fishing 01"".v lother tool such as a thread-cutting and thread-engaging die or tap, tap 23 being shown as provided with a central circulating passage 24 and with longitudinal clearance channels 25 and as engaging a fish 26.

A device of the general character described may be operated within a well hole simply by hoisting and lowering the entire drill or operating pipe from a derrick oor. When the drill pipe is hoisted, the plunger will obviously be raised to the top of the cylinder, all parts being put under lan upward tension and supported in such a relative position as will cause the luid which may be in the drill pipe above the plunger, or which may come through an inwardly opening lateral check valve in the sub or bolt 15, to enter and fill the cylinder. The valve last referred to may comprise a threaded seat or socket 28, a ball 29 and a spring 30, shown as retained by an apertured plug 31, seated, as by threading, adjacent the circulating passage 32 extending longitudinally of the sub or box 15.

Vhen the string of pipe is lowered after elevation in the manner described, the upper ball and seat or other valve being automatically closed under the operation of fluid pressure (optionally supplemented by the action of the spring 20, or its equivalent) the entire weight, or any desired fraction of. the weight of the drill pipe, which weight may amount to many thousands of pounds, may be brought 'to bear upon the Huid within the cylinder land transmitted therefrom through a die or tap or other tool therebe- `low into a iish, to facilitate the loosening into orupon or otherwise rigidly connected with a fish; but the mentioned splined connection between the piston shank 10 and the cylinder 1 or its head 9, or equivalent means, may be reliedpupon not onlyto permit the mentioned relative reciprocation of the parts referred to but to prevent a relative rotation thereof, thereby permitting a transmission, to a die or tap or other fishing tool, of a rotary motion suitable to its en gagement or disengagement, or permitting other well drilling operations.

The reciprocation of the plunger 2 of my through well drilling tools.

blance to an ordinary pump, fiuid beingl movedonly in a downwardly direction therethrough, may be repeated as often as necessary, and the described operations may be used in conjunction with any other operations of a usual or preferred type in the dislodgement of fishes by steps comprising a restoration of circulation therethrough,'or Aotherwise in the forcing of a circulation Although I have herein described one complete embodiment of my invention, suggesting alternativev details of construction,-

it will be understood that various features of my novel pressure gun might be independently employed, and also that various additional' modifications might bemade therein, without the slightest departure from the spirit and scope of my invention as the same is indicated above and in the following claims.

What I claim is: v

1. In a fishing equipment for use in drilled wells, a hydraulic or pressure gun comprising a plunger rigidly connected with a vertically movable string of pipe.

2. In a fishing equipment for use in drilled wells, a hydraulic or pressure gun comprising a piston cylinder rigidly connected with a threading tool.

3. In a fishing equipment for use in drilled wells, a hydraulic or pressure gun comprising a piston cylinder rigidly connected with a threading tool, said cylinder being provided with a piston connected with a string of pipe.

4. In a fishing equipment for use in drilled wells, a hydraulic or pressure gun comprising a Vpiston cylinder rigidly connected with a. threading tool, said cylinder being provided with a piston connected with a string of pipe by means preventing a relative rotation while permitting a relative reciprocation.

5. In a fishing equipment, means com` prising a piston and a cylinder cooperating therewith, secured in proximity to the lower end of a string of pipe for the utilizing of the weight of said string to force liquid downward through tools.

6. In a fishing equipment, means comprising a piston and a cylinder cooperating therewith, secured in proximity to the lower end of a string of pipe for the utilizing of the Weight of said string to force liquid downward through tools, comprising threading tools, and through a fish connected therewith.

7. In a fishing equipment, means lcom-A prising a piston and a cylinder cooperating therewith, secured in proximity to the lower end of a string of pipe for the utilizing of lthe weight of said string to force liquid downward through tools, said cylinder being provided with means for attachment to a sh.

8. In aE fishingequipment, means comprising a p-iston and a cylinder cooperating therewith, being provided with means for attachment to a fish and said piston being provided with means for attachment to- Aa string of piipe.

9. In a Shing equipment, means comprising a piston and a cylinder cooperating therewith, secured in proximity to the lower end of a string of pipe for the utilizing of the weight of said string to force liquid downward through tools, said piston and said cylinder being provided with co-operating means to prevent relative rotation while permitting a relative reciprocation thereof.

10. In the recovery of a sh by steps comprising a circulation, the method which comprises interposing apressure gun between the lower end of an operating string of pipe and the upper end of a fish, and employing the weight of said string to produce cirlower end of astring of pipe and the plunger or cylinder of a pressure gun.

12. In fishing equipment, a valved sub or box adapted to be interposed between the lower end of a string of pipe and the plungerl l or cylinder of a pressure gun, said su or box being provided with both a downwardly opening valve and an inwardly opening valve. I

In testimony whereof I have signed my name to this specification.

CLARENCE ooHs. 

